Practice Pakistan's most useful MCQs for competitive exams

The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?

• (A)  1 W
• (B)  2 W
• (C)  4 W
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The push-pull circuit must use ______________ operation?

• (A)  Class A
• (B)  Class C
• (C)  Class B
• (D)  Class AB

Answer

Submitted By :Ali Uppal

In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of _____________________?

• (A)  RC + RL
• (B)  RC || RL
• (C)  RL
• (D)  RC

Answer

Submitted By :Ali Uppal

The phase difference between the output and input voltages of a CE amplifier is _____________?

• (A)  180o
• (B)  0o
• (C)  90o
• (D)  270o

Answer

Submitted By :Ali Uppal

If the collector supply is 10V, then collector cut off voltage under d.c. conditions is _______________?

• (A)  20 V
• (B)  5 V
• (C)  2 V
• (D)  10 V

Answer

Submitted By :Ali Uppal

The input capacitor in an amplifier is the______________ capacitor?

• (A)  Coupling
• (B)  Bypass
• (C)  Leakage
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The slope of a.c. load line is ______________ that of d.c. load line?

• (A)  The same as
• (B)  More than
• (C)  Less than
• (D)  None of the above

Answer

Submitted By :Ali Uppal

A single stage transistor amplifier contains______________ and associated circuitry?

• (A)  Two transistors
• (B)  One transistor
• (C)  Three transistor
• (D)  None of the above

Answer

Submitted By :Ali Uppal

It is generally desired that a transistor should have_____________________ input impedance?

• (A)  Low
• (B)  Very low
• (C)  High
• (D)  Very high

Answer

Submitted By :Ali Uppal

In order to get more voltage gain from a transistor amplifier, the transistor used should have_________________?

• (A)  Thin base
• (B)  Thin collector
• (C)  Wide emitter
• (D)  None of the above

Answer

Submitted By :Ali Uppal